Preserve embedded original posts when rendering swarm reposts

Hop-State: A_06FPEZ3WB9ZANP4K6YVY4S0
Hop-Proposal: R_06FPEZ34Y13T1DBP9HTRMBR
Hop-Task: T_06FPEYF7BR1M5HZ8Z1684KG
Hop-Attempt: AT_06FPEYF7BS5KHWEJRTK2PW0

src/lib/swarm/feed-post.test.ts

@@ -0,0 +1,82 @@
+import { describe, expect, it } from 'vitest';
+import type { SwarmPost } from '@/app/api/swarm/timeline/route';
+import { mapSwarmPostToPost } from './feed-post';
+
+const original: SwarmPost = {
+    id: 'original-id',
+    content: 'Original post body',
+    createdAt: '2026-07-15T18:49:15.000Z',
+    author: {
+        handle: 'original-author',
+        displayName: 'Original Author',
+        avatarUrl: 'https://example.com/original.png',
+        isNsfw: false,
+    },
+    nodeDomain: 'remote.example',
+    nodeIsNsfw: true,
+    isNsfw: false,
+    likeCount: 2,
+    repostCount: 1,
+    replyCount: 0,
+    media: [{ url: 'https://example.com/image.jpg', mimeType: 'image/jpeg' }],
+};
+
+describe('mapSwarmPostToPost', () => {
+    it('preserves the complete embedded original when mapping a repost', () => {
+        const repost: SwarmPost = {
+            id: 'repost-id',
+            content: '',
+            createdAt: '2026-07-15T20:07:48.000Z',
+            repostOfId: original.id,
+            repostOf: original,
+            author: {
+                handle: 'reposter',
+                displayName: 'Reposter',
+                isNsfw: false,
+            },
+            nodeDomain: 'remote.example',
+            nodeIsNsfw: true,
+            isNsfw: false,
+            likeCount: 0,
+            repostCount: 0,
+            replyCount: 0,
+        };
+
+        const mapped = mapSwarmPostToPost(repost);
+
+        expect(mapped.repostOfId).toBe('swarm:remote.example:original-id');
+        expect(mapped.repostOf).toMatchObject({
+            id: 'swarm:remote.example:original-id',
+            content: 'Original post body',
+            nodeDomain: 'remote.example',
+            author: {
+                handle: 'original-author',
+                nodeIsNsfw: true,
+            },
+            media: [{
+                id: 'swarm:remote.example:original-id:media:0',
+                url: 'https://example.com/image.jpg',
+                mimeType: 'image/jpeg',
+            }],
+        });
+    });
+
+    it('preserves interaction and link-preview fields', () => {
+        const mapped = mapSwarmPostToPost({
+            ...original,
+            isLiked: true,
+            isReposted: true,
+            linkPreviewUrl: 'https://example.com/story',
+            linkPreviewTitle: 'Story',
+            linkPreviewType: 'card',
+        });
+
+        expect(mapped).toMatchObject({
+            isLiked: true,
+            isReposted: true,
+            linkPreviewUrl: 'https://example.com/story',
+            linkPreviewTitle: 'Story',
+            linkPreviewType: 'card',
+        });
+    });
+});

src/lib/swarm/feed-post.ts

@@ -0,0 +1,55 @@
+import type { SwarmPost } from '@/app/api/swarm/timeline/route';
+import type { Post } from '@/lib/types';
+
+export type InteractiveSwarmPost = SwarmPost & {
+    isLiked?: boolean;
+    isReposted?: boolean;
+};
+
+export function mapSwarmPostToPost(post: InteractiveSwarmPost): Post {
+    const normalizedId = `swarm:${post.nodeDomain}:${post.id}`;
+
+    return {
+        id: normalizedId,
+        originalPostId: post.id,
+        content: post.content,
+        createdAt: post.createdAt,
+        likesCount: post.likeCount,
+        repostsCount: post.repostCount,
+        repliesCount: post.replyCount,
+        isSwarm: true,
+        nodeDomain: post.nodeDomain,
+        repostOfId: post.repostOfId
+            ? `swarm:${post.nodeDomain}:${post.repostOfId}`
+            : null,
+        repostOf: post.repostOf
+            ? mapSwarmPostToPost(post.repostOf as InteractiveSwarmPost)
+            : null,
+        author: {
+            id: `swarm:${post.nodeDomain}:${post.author.handle}`,
+            handle: post.author.handle,
+            displayName: post.author.displayName,
+            avatarUrl: post.author.avatarUrl,
+            isSwarm: true,
+            isBot: post.author.isBot,
+            isNsfw: post.author.isNsfw,
+            nodeIsNsfw: post.nodeIsNsfw,
+            nodeDomain: post.nodeDomain,
+        },
+        media: post.media?.map((item, index) => ({
+            id: `${normalizedId}:media:${index}`,
+            url: item.url,
+            altText: item.altText || null,
+            mimeType: item.mimeType || null,
+        })) || [],
+        linkPreviewUrl: post.linkPreviewUrl || null,
+        linkPreviewTitle: post.linkPreviewTitle || null,
+        linkPreviewDescription: post.linkPreviewDescription || null,
+        linkPreviewImage: post.linkPreviewImage || null,
+        linkPreviewType: post.linkPreviewType || null,
+        linkPreviewVideoUrl: post.linkPreviewVideoUrl || null,
+        linkPreviewMedia: post.linkPreviewMedia || null,
+        isLiked: post.isLiked || false,
+        isReposted: post.isReposted || false,
+    };
+}